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Messages - Sumukh P

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1
DIY AstroEQ / Re: mega and ramps 1.4 board
« on: June 10, 2020, 09:56:36 »
Thank you. Is there a need of pull up otherwise or it is controlled through code? Also, is it incorporated in latest firmware?

2
DIY AstroEQ / Re: mega and ramps 1.4 board
« on: June 09, 2020, 14:45:00 »
Dear Tom,
Is there any emergency stop button for Mega2560 based button? If not, is it possible to add?

3
DIY AstroEQ / Re: Problem with Dec axis Goto
« on: May 08, 2020, 14:00:52 »
Hi Tom,
I am not using AstroEQ PCB. I have made my own Mega2560 version with only two motors, no other connectors.
Previously on myn old laptop, I was able to GoTo without any extra settings.
On my new laptop, I reinstalled everything now and the problem started. But I found the solution.
So, I am using stellariumscope. There I have to select mount. Which I selected HEQ5/6. In that properties, I set the coordinates of my location.
Again in mount settings option, I kept it to auto detect, and it took some random gear ratio and steps. Which was 8 times higher for DEC and 1.2 times higher for RA.
So in that place, I replaced the values obtained from config utility and it worked immediately.
I didn't remember doing this before in my old laptop.

Thanks,

4
DIY AstroEQ / Re: Problem with Dec axis Goto
« on: May 06, 2020, 15:32:25 »
Hello.
Problem solved.
I had to change the gear ratios in ASCOM HEQ5 settings. Previously it was set to auto, then I changed it to custom and gave RA/DEC worm steps and steps per rev.

Thanks Tom for such robust hardware.

5
DIY AstroEQ / Re: Problem with Dec axis Goto
« on: April 30, 2020, 11:26:03 »
Initially I thought I have problem with my driver but then I interchanged the drivers and checked again. There is same issue.

6
DIY AstroEQ / Problem with Dec axis Goto
« on: April 30, 2020, 11:21:42 »
Hello,
I have made my own pcb for astroEQ with Mega2560 and DRV8825. I had some free time so tried my hands on goto for my mount. I have German EQ2 mount came with my telescope. I have fixed 2 Nema 17 steppers. I downloaded latest version of AstroEQ, Updated the firmware by setting correct gear ratios. I have 138:1 Worm ratio and there is steel spur gear to which I have attached another gear on RA motor giving the ratio of 5.38451638. I have 87:1 Worm ratio for DEC axis and to increase it further I have attached a 36 teeth GT2 pulley and another 20 teeth pulley on DEC motor making ratio of 1.8:1.
When I input these values in AstroEQ.exe, I could get proper numbers as per calculations of Ival, Aval, Bval.
Problem is after uploading and connecting with EQMOD, I am not able to slew it to correct DEC position. It is slewing almost 8 times more than required.

Here are the steps I am following,
I am using stellariumscope and latest version of Stellarium for control. In Stellariumscope I am selecting HEQ5/6 ASCOM. in Stellarium also I am selecting either ASCOM or local telescope through external software.
I tried manual slew using EQMOD using N S E W buttons. Still It is slewing at wrong point.
Any help woould be greatly appreciated.

7
DIY AstroEQ / Support for Meade LX200
« on: June 01, 2018, 18:10:18 »
Hi,
My friend is having meade LX200 and the telescope is not communicating now with the computer.

Is it possible to run that with AstroEQ?
I mean to ask whether AstroEQ supports LX200 protocol? and what are the changes required to be done in firmware?

8
General Discussion / Re: AstroEQ 8.11 Released
« on: May 23, 2018, 09:52:58 »
Hi,
First of all sorry for this post.
I found out the mistake, I have made the pcb tracks at wrong pins..

Will test with correct pins tonight and if the problem still persists I will revert back..
Once again Thanks Tom for great job in designing AstroEQ.

9
General Discussion / Re: AstroEQ 8.11 Released
« on: May 20, 2018, 17:28:52 »
Dear Tom,
Thanks for new version of config utility of AstroEQ.
It has solved the error for DEC calculations using Arduino MEGA2560.

I have another issue now.
My config is as follows

Motor step angle 1.8
Motor gear ratio is 1.8
Worm gear ratio is 87:1

My DEC motor is jerking.
What should be GoTo rate??

I have checked my custom made PCB many times, tracks are fine with excellent continuity.

Please help..


10
General Discussion / Re: AstroEQ 8.11 Released
« on: February 11, 2018, 12:44:55 »
Dear Tom,
Thanks for this great job of designing AstroEQ and working on it.
I am facing problem even in new version.

Dec gear ration in my case is 1.8.
If I give 1.8, it shows error. I have to give 1.798. It shows error even at 1.796.

I am attaching conf file here.

11
Mount Support / Re: Support for german EQ2
« on: July 10, 2017, 18:29:19 »
Hii again, I have designed my own PCB for using Arduino Mega2560 and DRV8825 stepper driver ICs, for German EQ2, which I have. I have burned the AstroEQ firmware in MEGA.

I opened the mount to calculate worm gear ratio in both RA and Dec axes.
(Please correct me if I am wrong in following calculations)
I have a stainless steel gear on worm shaft, with 140 teeth. (Mount allows to have tracking motors). So I purchased an MK8 Extruder Drive Gear 26Teeth, which has exactly same tooth size as that of SS gear. So the motor gear ratio becomes 140/26= 5.3846153846. Which I am giving Input in AstroEQ configuration utility. My RA worm gear has 138 teeth, so Worm ratio, I am giving as 138. It is giving Axis step/rev as 4755693. Worm steps as 34462. Sidereal bVal as 16558. Ival as 300.

Q.)  What is the unit of bVal?

Again my Dec has 87 teeth for worm gear arrangement. If I want to use motor directly then Motor gear ratio is 1:1, but If I put 86 as worm gear ratio, It is giving an error.

I want to know how the parameters are calculated in AstroEQ configuration utility.

I calculated on my own the RA tracking speed and other things, I am getting different numbers.

I will share that Excel sheet here. Can anyone have  a look at this and tell me.


12
Mount Support / Re: Support for german EQ2
« on: August 01, 2016, 06:02:51 »
Ok. Bresser has provided an arrangement to attach motor drive from GoTo. But since GoTo is costlier I think it is better to make one with stepper motors. I am not from engineering background. Can you tell me how to find gear ratios??

13
Mount Support / Support for german EQ2
« on: July 31, 2016, 08:43:56 »
Hii.. I have Bresser Galaxia 114/900 EQ2 telescope. I want to know if this mount is supported by AstroEQ. I want to make DIY AstroEQ.

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